55530015 has 16 divisors (see below), whose sum is σ = 89222496. Its totient is φ = 29491200.

The previous prime is 55530011. The next prime is 55530017. The reversal of 55530015 is 51003555.

It is not a de Polignac number, because 55530015 - 2² = 55530011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55530011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4066 + ... + 11295.

It is an arithmetic number, because the mean of its divisors is an integer number (5576406).

Almost surely, 2^55530015 is an apocalyptic number.

55530015 is a deficient number, since it is larger than the sum of its proper divisors (33692481).

55530015 is a wasteful number, since it uses less digits than its factorization.

55530015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15610.

The product of its (nonzero) digits is 1875, while the sum is 24.

The square root of 55530015 is about 7451.8464154866. The cubic root of 55530015 is about 381.5129319461.

Subtracting from 55530015 its sum of digits (24), we obtain a triangular number (55529991 = T₁₀₅₃₈).

The spelling of 55530015 in words is "fifty-five million, five hundred thirty thousand, fifteen".